cara mengatasi Undifined method hasMany ?

masih belum paham di bagian hashmany error undifined nya, cara solving nya gimana ya ?

BadMethodCallException

Call to undefined method App\Models\Post::hashMany() (View: /home/wudstn/Documents/webstuf/iglike/resources/views/home.blade.php)

ini view nya:

@extends('layouts.app')

@section('content')
<div class="container">
    <div class="row justify-content-center">
        <div class="col-md-8">
            <div class="card">
                <div class="card-header">{{ __('Dashboard') }}</div>

                <div class="card-body">

                    <h3>Feed</h3>
                    @foreach ($posts as $post)

                       <div>
                            <img src="{{asset('images/posts/' . $post->image)}}" alt="{{$post->caption}}" width="200px" height="200px"/>
                            <a href="/{{'@'.$post->user->username}}">{{'@'.$post->user->username}}</a>

                            <button class="btn btn-primary" onclick="like({{$post->user->id}}, this)">
                                {{ ($post->is_liked() ? 'unlike' : 'like' ) }}
                             </button>

                            <script>
                                function like(id, el) {
                                    fetch('/like/' + id)
                                        .then(response => response.json())
                                        .then(data => {
                                              el.innerText = (data.status == 'LIKE') ? 'unlike' : 'like'
                                         });
                                }
                            </script>`
                        </div>
                    @endforeach
                </div>
            </div>
        </div>
    </div>
</div>
@endsection

ini model:

<?php

namespace App\Models;

use Auth;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Factories\HasFactory;

class Post extends Model
{
    use HasFactory;

    protected $guarded = ['id'];

    public function user()
    {
        return $this->belongsTo('App\Models\User');
    }

    public function likes()
    {
        return $this->hashMany('App\Models\Like');
    }

    public function is_liked()
    {
        return $this->likes->where('user_id', Auth::user()->id)->count();
    }
}

Screenshot from 2021-01-25 14-40-24.pngScreenshot from 2021-01-25 14-40-20.pngScreenshot from 2021-01-25 14-23-03.png